[Solved] How to make a UEFI install

Questions about Grub, UEFI,the liveCD and the installer
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knightfury
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[Solved] How to make a UEFI install

Post by knightfury » Wed Jan 25, 2017 3:25 pm

Installed OS:
Kernel: 4.4.0-53-generic x86_64 (64 bit)
Desktop: Cinnamon 3.2.7 Distro: Linux Mint 18.1 Serena

So this is the motherboard i purchased Gigabyte GA-H110M-S2 . The specification under BIOS option from the website says
1 x 64 Mbit flash
Use of licensed AMI UEFI BIOS
PnP 1.0a, DMI 2.7, WfM 2.0, SM BIOS 2.7, ACPI 5.0
This was the bios settings before i installed mint- http://i.imgur.com/S8AoOBv.jpg [If i remember well i changed "Storage Boot Option Control" from Legacy to 'UEFI only' before installing.] First time i set the HDD to GPT partition table, then rebooted and installed and choose these partitions via the installed 1.EFI System Partition 2. Swap 3. / (Root) 4. /home and proceeded with the install. I got a "Force UEFI installation" in the next dialog for which i chose "Continue" option and installed Mint.

Code: Select all

cat /sys/firmware/efi/fw_platform_size
cat: /sys/firmware/efi/fw_platform_size: No such file or directory

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dpkg -l | grep grub-efi
No Output

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dpkg -l | grep grub-pc
ii grub-pc 2.02~beta2-36ubuntu3.2 amd64 GRand Unified Bootloader, version 2 (PC/BIOS version)
ii grub-pc-bin 2.02~beta2-36ubuntu3.2 amd64 GRand Unified Bootloader, version 2 (PC/BIOS binaries)

Code: Select all

ls /sys/firmware/efi/
ls: cannot access '/sys/firmware/efi/': No such file or directory

No contents in /boot/efi either.

So it looks like it is installed in legacy mode. Why wasn't it installed in UEFI mode ? how to install it in UEFI mode?

PS: will be mult-ibooting with GPT regardless of the mode.
Last edited by knightfury on Sun Jan 29, 2017 5:03 pm, edited 2 times in total.

Laurent85
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Re: How to make a UEFI install

Post by Laurent85 » Wed Jan 25, 2017 6:25 pm

Restoring bios settings to default values should enable UEFI.

Before installing check folder /sys/firmware/efi/ exists in the live session.
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jimallyn
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Re: How to make a UEFI install

Post by jimallyn » Wed Jan 25, 2017 6:50 pm

Tutorial on UEFI installs. Written for 8/8.1, but applies to 10 also.

viewtopic.php?t=163126
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fabien85
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Re: How to make a UEFI install

Post by fabien85 » Thu Jan 26, 2017 7:45 am

Laurent85 wrote:Before installing check folder /sys/firmware/efi/ exists in the live session.
Indeed, it's possible you booted the live media in Legacy mode.
Anyway you can later convert the install to UEFI mode by installing grub-efi, or refind

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austin.texas
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Re: How to make a UEFI install

Post by austin.texas » Thu Jan 26, 2017 11:30 am

Or, you can chose to install in Legacy mode to your GPT partitioned hard drive. (assuming that you don't have Windows installed in UEFI mode)
Tutorial: Install in Legacy mode to GPT Partitions
Mint 18.2 Cinnamon, Quad core AMD A8-3870 with Radeon HD Graphics 6550D, 8GB DDR3, Ralink RT2561/RT61 802.11g PCI
Linux Linx 2018

knightfury
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Re: How to make a UEFI install

Post by knightfury » Sun Jan 29, 2017 5:02 pm

After checking the manual i found that the UEFI CSM(compatibility support module-to support a legacy PC boot process.) is enabled by default. Had to set the "windows 8/10 Features" item to Windows 8/10 option ( though i don't have any windows installed) which unlocks the options for CSM ( as this setting was hidden ), after which i was able to make an UEFI install. Thank you all.

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